Endoscopic cutting instrument
First Claim
1. An endoscopic cutting instrument to be used in conjunction with endoscopic surgical procedures, which comprises:
- a) a housing member dimensioned to be grasped by the hand of a user;
b) an elongated tubular member connected to the housing member and extending distally therefrom, the elongated member defining a longitudinal axis and having a longitudinal bore extending therethrough;
c) a drive member at least partially accommodated within the longitudinal bore of the tubular member and reciprocally longitudinally movable therein;
d) a blade member disposed at a distal end of the drive member and defining a cutting edge for incising tissue;
e) an actuating member associated with the housing member and operatively connected to the drive member, the actuating member movable to cause corresponding distal movement of the drive member to at least partially expose the blade member beyond a distal end of the tubular member; and
f) a release member including a locking surface selectively engageable with one of the drive member and the housing member wherein engagement of the locking surface of the release member with one of the drive member and the housing member prevents distal movement of the drive member and exposure of the blade member beyond the distal end of the tubular member, the release member movable independent of movement of the actuating member to cause release of the locking surface from the one of the drive member and the housing member to permit distal movement of the drive member and exposure of the blade member.
1 Assignment
0 Petitions
Accused Products
Abstract
An endoscopic cutting instrument to be used in conjunction with endoscopic surgical procedures, includes a housing member elongated tubular member connected to the housing member and extending distally therefrom, a drive member at least partially accommodated within the tubular member and reciprocally longitudinally movable therein, a blade member disposed at a distal end of the drive member and defining a cutting edge for incising tissue and an actuating member associated with the housing member and operatively connected to the drive member. The actuating member is movable to cause corresponding movement of the drive member to at least partially expose the blade member beyond a distal end of the tubular member. The instrument also includes a release member associated with the actuating member. The release member is preferably movable between an engaged position preventing movement of the actuating member and a disengaged position permitting movement of the actuating member and corresponding movement of the drive member to at least partially expose the blade member. The instrument may also include a spring mechanism which automatically retracts the blade member upon release of the actuating member.
183 Citations
14 Claims
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1. An endoscopic cutting instrument to be used in conjunction with endoscopic surgical procedures, which comprises:
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a) a housing member dimensioned to be grasped by the hand of a user; b) an elongated tubular member connected to the housing member and extending distally therefrom, the elongated member defining a longitudinal axis and having a longitudinal bore extending therethrough; c) a drive member at least partially accommodated within the longitudinal bore of the tubular member and reciprocally longitudinally movable therein; d) a blade member disposed at a distal end of the drive member and defining a cutting edge for incising tissue; e) an actuating member associated with the housing member and operatively connected to the drive member, the actuating member movable to cause corresponding distal movement of the drive member to at least partially expose the blade member beyond a distal end of the tubular member; and f) a release member including a locking surface selectively engageable with one of the drive member and the housing member wherein engagement of the locking surface of the release member with one of the drive member and the housing member prevents distal movement of the drive member and exposure of the blade member beyond the distal end of the tubular member, the release member movable independent of movement of the actuating member to cause release of the locking surface from the one of the drive member and the housing member to permit distal movement of the drive member and exposure of the blade member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14)
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10. An endoscopic cutting instrument to be used in conjunction with endoscopic surgery, which comprises:
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a) a frame; and b) an endoscopic portion connected to the frame and extending distally therefrom, the endoscopic portion including; i) an elongated tubular member defining a longitudinal axis; ii) a rod member at least partially disposed within the tubular member and reciprocally longitudinally movable therein between a proximalmost position and a distalmost position; and iii) a blade member connected to the rod member; c) an actuating member operatively connected to the rod member, the actuating member movable between first and second positions thereof, the first position corresponding to the proximalmost position of the rod member wherein the blade member is fully contained within the tubular member, the second position corresponding to the distalmost position of the rod member wherein the blade member is at least partially exposed beyond the tubular member; d) a spring member operatively connected to the actuating member for biasing the actuating member to the first position thereof; and e) a manually engageable release member operatively connected to the actuating member, the release member defining an engaging surface engageable with the frame to prevent movement of the actuating member to the second position thereof, wherein movement of the release member causes disengagement of the engaging surface with the frame to permit movement of the actuating member to the second position thereof, and wherein movement of the release member is independent of movement of the actuating member. - View Dependent Claims (11, 12, 13)
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Specification